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