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