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