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