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)(23,30)(24,34)(25,28)(26,29)(27,33)(31,35)(32,36)(1,2,4,3)(5,7,8,16)(6,11,13,15)(9,17,10,18)(12,19,14,20)(21,23)(22,27)(24,32)(25,33)(26,31)(28,30)(29,36)(34,35)(6,12)(9,10)(11,19)(13,14)(15,20)(17,18)(22,28)(23,31)(24,26)(27,35)(30,36)(32,33) involution — undirected(1,3,4,2)(6,13)(7,16)(12,14)(17,18)(21,24,25,26)(22,29,28,34)(23,32,33,31)(27,36,30,35)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.