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