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