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