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