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)(19,22)(20,21)(23,24)(25,26)(27,31)(28,29)(30,32) involution — undirected(2,5)(3,7)(10,13)(14,15)(18,21)(22,24)(25,27)(26,30)(28,31)(29,32) involution — undirected(2,5)(6,8)(11,16)(14,15)(17,19,20,23)(18,22,21,24)(25,27,29,32)(26,31,28,30)(1,2)(3,6)(4,5)(7,8)(9,11,12,16)(10,14,13,15)(17,19)(18,22)(20,23)(21,24)(25,27)(26,31)(28,30)(29,32)(1,3)(2,6)(4,7)(5,8)(9,10)(11,14)(12,13)(15,16)(17,18)(19,22)(20,21)(23,24)(25,28,29,26)(27,30,32,31)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.