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