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)(11,13)(12,15)(14,16)(17,18,23,25,22,21,20,28)(19,24,26,32,27,30,29,31)(3,8)(5,7)(9,11,13,10)(12,15,16,14)(17,19)(18,24)(20,29)(21,30)(22,27)(23,26)(25,32)(28,31)(1,3,4,8)(2,5,6,7)(10,11)(14,15)(17,20,22,23)(18,25,21,28)(19,26,27,29)(24,31,30,32)(2,6)(5,7)(10,11)(14,15)(17,21,23,28,22,18,20,25)(19,24,26,32,27,30,29,31)(9,12,13,16)(10,14,11,15)(19,27)(24,30)(26,29)(31,32)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.