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