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