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