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