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