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