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