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