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