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