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