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