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