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