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)(21,22,27,24)(23,28,33,34)(25,29,26,30)(31,35,36,32)(5,7,9,15)(6,10,12,13)(8,14,17,20)(11,18,16,19)(21,23,27,33)(22,28,24,34)(25,32,26,35)(29,31,30,36)(2,4)(21,24,27,22)(23,31,33,36)(25,29,26,30)(28,35,34,32)(5,8,9,17)(6,11,12,16)(7,14,15,20)(10,18,13,19)(21,25,27,26)(22,29,24,30)(23,32,33,35)(28,31,34,36)(7,15)(10,13)(14,20)(18,19)(23,32)(25,26)(28,31)(29,30)(33,35)(34,36) 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.