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