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