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