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