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