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