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