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