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