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