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