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