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