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