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