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