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