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