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