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