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