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