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