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