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