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