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