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