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