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