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