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