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