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