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