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