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