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