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