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