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