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