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