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