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