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