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