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