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