One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,7)(5,8)(9,10)(11,13)(12,14)(15,16)(17,18,23,20,22,26,21,25)(19,27,30,32,31,24,29,28)(1,3,6,2)(4,7,5,8)(9,11,12,15)(10,13,14,16)(17,19)(18,24)(20,28)(21,29)(22,31)(23,30)(25,32)(26,27)(10,14)(13,16)(17,20,23,26,22,25,21,18)(19,28,30,27,31,32,29,24)(1,4,6,5)(2,7,3,8)(17,21,22,23)(18,25,26,20)(19,29,31,30)(24,32,27,28)(1,5,6,4)(2,7,3,8)(17,21,22,23)(18,20,26,25)(19,30,31,29)(24,32,27,28)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.