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)(21,22,26,31)(23,32,27,28)(24,30,33,36)(25,29,34,35)(5,6,8,9)(7,10,11,12)(13,15,16,19)(14,17,18,20)(21,23,26,27)(22,28,31,32)(24,34,33,25)(29,36,35,30)(5,7,8,11)(6,10,9,12)(15,19)(17,20)(21,24,27,34,26,33,23,25)(22,29,32,36,31,35,28,30)(2,4)(6,9)(10,12)(21,25,23,33,26,34,27,24)(22,30,28,35,31,36,32,29)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.