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