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