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