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)(11,13)(12,14)(15,16)(17,18,22,27)(19,23,29,24)(20,30,28,32)(21,26,31,25)(2,5)(6,7)(9,11,15,12)(10,13,16,14)(17,19,22,29)(18,23,27,24)(20,31,28,21)(25,32,26,30)(9,12,14,10,15,11,13,16)(17,20,31,19,22,28,21,29)(18,24,26,32,27,23,25,30)(1,3,4,8)(2,6,5,7)(9,13,15,14)(10,11,16,12)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.