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