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)(21,22,26,29)(23,27,31,34)(24,33,28,25)(30,36,35,32)(1,2)(3,4)(5,7,14,18,9,16,8,15)(6,10,17,20,12,19,11,13)(21,23)(22,27)(24,30)(25,32)(26,31)(28,35)(29,34)(33,36)(2,4)(21,24,25,22,26,28,33,29)(23,30,32,27,31,35,36,34)(5,7,14,18,9,16,8,15)(6,10,17,20,12,19,11,13)(23,31)(27,34)(30,35)(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.