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