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