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