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