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