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