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)(21,22,27,32,26,31,25,30)(23,33,34,36,24,28,35,29)(1,2,4,3)(5,7,8,16)(6,11,13,15)(9,17,10,18)(12,19,14,20)(21,23,25,35,26,24,27,34)(22,28,30,36,31,33,32,29)(6,12)(9,10)(11,19)(13,14)(15,20)(17,18)(21,24,26,23)(22,29,31,36)(25,35,27,34)(28,30,33,32)(1,3,4,2)(21,25,26,27)(22,30,31,32)(23,34,24,35)(28,29,33,36)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.