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