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