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