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