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