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