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