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