As it says on the tin. I definitely used several existing ones as reference (the Alien-Halfsheet and the AlienRPG_PlayerReference PDFs I'd found via Fria Ligan's forums) and tried to either cut out the stuff I was happy to look up in the book at the session, or add in some clarifications as I found them (there weren't many).
Let me know what you think!
Cheat-Sheet_ALIEN-RPG.pdf via Google Drive