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