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