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