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