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