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)(13,14,18,16)(15,19,17,20)(21,22,26,30)(23,24,28,27)(25,33,34,29)(31,35,36,32)(6,9)(10,12)(13,15,18,17)(14,19,16,20)(23,28)(24,27)(31,36)(32,35)(7,11)(10,12)(13,16,18,14)(15,19,17,20)(21,23,26,28)(22,27,30,24)(25,31,34,36)(29,35,33,32)(1,2)(3,4)(5,6)(7,12)(8,9)(10,11)(13,17,18,15)(14,19,16,20)(21,24,26,27)(22,28,30,23)(25,32,34,35)(29,36,33,31)(5,7,8,11)(6,10,9,12)(21,25,26,34)(22,29,30,33)(23,31,28,36)(24,32,27,35)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.