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