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