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