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