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