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