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