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