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