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