One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,4)(5,6,9,12)(7,13,15,10)(8,16,17,11)(14,18,20,19)(21,22,26,25)(23,27,30,33)(24,28,32,34)(29,35,36,31)(5,7,9,15)(6,10,12,13)(8,14,17,20)(11,18,16,19)(21,23,26,30)(22,27,25,33)(24,31,32,35)(28,29,34,36)(2,4)(21,24,26,32)(22,28,25,34)(23,29,30,36)(27,35,33,31)(5,8,9,17)(6,11,12,16)(7,14,15,20)(10,18,13,19)(24,32)(28,34)(29,36)(31,35)(7,15)(10,13)(14,20)(18,19)(22,25)(23,27)(28,34)(29,35)(30,33)(31,36) involution — undirectedA 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.