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