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