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