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)(11,16)(12,13)(14,15)(17,18,21,22)(19,23,24,20)(25,26,31,29)(27,32,30,28)(2,5)(3,8)(9,11,14,12)(10,13,15,16)(17,19,21,24)(18,20,22,23)(25,27,31,30)(26,32,29,28)(3,8)(6,7)(10,15)(13,16)(17,18,21,22)(19,23,24,20)(25,28)(26,30)(27,29)(31,32)(1,2)(3,7)(4,5)(6,8)(9,12,14,11)(10,16,15,13)(17,20)(18,19)(21,23)(22,24)(25,29,31,26)(27,32,30,28)(1,3,4,8)(2,6,5,7)(9,13,14,16)(10,12,15,11)(17,18)(19,23)(20,24)(21,22)(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.