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