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