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