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