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