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