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)(17,18,23,25)(19,26,29,22)(20,24,30,21)(27,28,32,31)(1,2,4,6)(3,5,8,7)(9,10,13,14)(11,15,16,12)(17,19)(18,22)(20,27)(21,28)(23,29)(24,31)(25,26)(30,32)(1,2,4,6)(3,7,8,5)(9,11)(10,12)(13,16)(14,15)(17,20,23,30)(18,24,25,21)(19,27,29,32)(22,31,26,28)(1,2,4,6)(3,5,8,7)(9,12)(10,11)(13,15)(14,16)(17,18)(19,22)(20,24)(21,30)(23,25)(26,29)(27,31)(28,32)(1,2)(3,5)(4,6)(7,8)(9,10)(11,12)(13,14)(15,16)(17,21,23,24)(18,20,25,30)(19,28,29,31)(22,27,26,32)(1,3,4,8)(2,5,6,7)(9,12)(10,11)(13,15)(14,16)(17,22)(18,19)(20,28)(21,27)(23,26)(24,32)(25,29)(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.