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