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