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