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