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