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