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