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