Is it safe to share a visual aid to help explain a SAFE to prospective angels (sophisticated investors but no tech/SV experience)?

From a legal perspective, be very careful on sharing any “advise.” In general, never accept money from someone who doesn’t understand startup investing and the risk involved. Granted, there are lots of guides on SAFEs on popular blogs like Saastr and bothsidesofthetable. SAFEs are good for people who understand tech risk/reward. If they are "sophisticated investors", they might be used to real estate which has extremely different risk/reward profile.