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