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