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