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