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