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