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