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