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