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