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