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