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