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)(21,22,26,27,25,28,24,30)(23,29,33,34,32,35,31,36)(5,7)(6,10)(8,15)(9,14)(11,19)(12,18)(13,16)(17,20)(22,27)(23,31)(24,26)(28,30)(32,33)(34,36) involution — undirected(2,4)(5,8,9,16)(6,11,12,20)(7,13,14,15)(10,17,18,19)(22,28)(23,32)(27,30)(31,33)(8,16)(11,20)(13,15)(17,19)(21,23,26,33,25,32,24,31)(22,29,27,34,28,35,30,36)(6,12)(7,14)(11,20)(13,15) 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.