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