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