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