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)(18,23)(19,26)(20,21)(24,32)(25,29)(27,31)(1,3)(2,6)(4,7)(5,8)(9,11)(10,12)(13,15)(14,16)(17,18,20,29,22,25,21,23)(19,27,30,31,26,24,28,32)(1,4,5,2)(3,7,8,6)(10,15)(11,16)(17,19,22,26)(18,24,25,27)(20,30,21,28)(23,31,29,32)(3,8)(6,7)(9,12,14,13)(10,11,15,16)(17,20,22,21)(18,23,25,29)(19,28,26,30)(24,32,27,31)(9,13,14,12)(10,11,15,16)(17,18,20,29,22,25,21,23)(19,24,30,32,26,27,28,31)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.