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