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