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