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