How to make a move without feeling predatory?

1. Remember that your concern about seeming predatory means that you are coming from a perspective that respects her boundaries. People who are predatory generally do not think about this. So there's a pretty good that if you are being thoughtful, you can trust your instincts.
2. If she is into you (i.e. you continue to enjoy spending time together in a romantic/sexual context), advances are probably welcome!! That's kind of the point! You just have to figure out how she likes to be flirted with. There's nothing like the feeling of someone I'm attracted to making moves on me. I generally can't make a first move or initiate the advances, so if the other lady does...hellllll yes. I. Love. It. It makes me feel sexy and special.
3. Test the waters/navigate consent by starting small (with a small compliment or light flirtation). If she responds positively, amp it up. It's a back and forth situation, not just one person coming on to the other. If at any point she backs off, a bit, you respect it, and therefore you have demonstrated that you respect her boundaries, which is a great quality for someone to have.

You could ask if she wants to hear it. For instance, "is it ok to say how much I want to XXX the next time I see you?"

That way you get to say it and still get her consent for next time you want to be sexty. Plus her response might be something blush-worthy and then you'll have to post it here to keep us in the loop. 😁

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If you’re not sure, remember you are a woman! Imagine a woman you aren’t attracted to hitting on you, what can she do that would make you feel comfortable and not pressured?

Ease into it and see how she responds. Start by complimenting her appearance and obviously checking her out, if she's into it then you can get dirtier with your talk