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