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