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