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