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