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