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