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