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