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