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