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