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