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