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