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