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