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