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