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