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