I have seen a couple of different approaches to this. One was an A4 size pad with the company site rules on it and a signature line on the top which was perforated. Visitors and short term workers/delivery drivers were required to read the rules, sign the top and then rip the site rules from the bottom and keep with them while on site as it had the emergency evacuation map on the back.
There is also a company which make up visitor and contractor induction badge books at not a bad price
www.compact.com.au
I am sure there are plenty of other ideas but maybe these will give you some ideas on where to start.