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