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