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