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