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