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