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