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