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