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