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