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