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