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