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