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