One vertex per element, one color per generator, with an edge from x to x·s.
(2,3)(5,6,10,12,8,13,9,14)(7,15,18,20,16,11,17,19)(21,22)(23,26)(24,28)(25,27)(29,33)(30,35)(31,34)(32,36)(1,2,4,3)(5,7,8,16)(6,11,13,15)(9,17,10,18)(12,19,14,20)(21,23,24,30,25,31,32,29)(22,26,28,35,27,34,36,33)(6,12)(9,10)(11,19)(13,14)(15,20)(17,18)(23,29)(24,32)(26,33)(28,36)(30,31)(34,35) involution — undirected(1,3,4,2)(6,13)(11,15)(12,14)(19,20)(22,27)(26,34)(28,36)(33,35)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.