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