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