One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,3,4)(6,9)(10,12)(13,14,16,18)(15,17,19,20)(21,22,27,35,25,28,26,31)(23,30,34,29,32,36,24,33)(5,6)(7,10)(8,9)(11,12)(13,15,16,19)(14,17,18,20)(22,28)(23,32)(24,34)(31,35)(2,4)(5,7,8,11)(6,10,9,12)(15,19)(17,20)(21,23)(22,29)(24,27)(25,32)(26,34)(28,33)(30,35)(31,36)(6,9)(10,12)(21,24,25,34)(22,30,28,36)(23,27,32,26)(29,35,33,31)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.