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