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