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