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