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