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