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)(11,16)(15,20)(17,19)(21,22)(23,27)(24,26)(25,32)(28,31)(29,35)(30,34)(33,36)(5,7,9,16,10,17,8,15)(6,11,12,14,13,20,18,19)(22,26)(23,29,30,33)(27,35,34,36)(28,32)(5,8,10,9)(6,12,13,18)(7,15,17,16)(11,19,20,14)(21,23)(22,27)(24,30)(25,33)(26,34)(28,35)(29,31)(32,36)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.