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