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