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