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