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