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