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