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