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