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