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