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