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