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)(15,20)(16,19)(17,18)(21,22,26,23)(24,29,31,27)(25,28,33,30)(32,35,36,34)(5,7,10,8)(6,11,9,12)(13,15)(14,16)(17,20)(18,19)(22,23)(24,31)(28,30)(32,36)(6,9)(11,12)(14,17)(15,19)(21,23,26,22)(24,29,31,27)(25,28,33,30)(32,34,36,35)(1,2,3,4)(5,8,10,7)(6,12,9,11)(13,16,18,20)(14,19,17,15)(21,24,26,31)(22,27,23,29)(25,32,33,36)(28,34,30,35)(5,9,10,6)(7,12,8,11)(13,17,18,14)(15,20,19,16)(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.