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