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