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