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