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