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