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