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)(12,14)(13,16)(17,18,23,25)(19,26,20,24)(21,22,31,32)(27,30,29,28)(1,3,4,8)(2,5,6,7)(9,10,12,14)(11,13,16,15)(1,2,4,6)(3,5,8,7)(9,10)(11,13)(12,14)(15,16)(17,19,23,20)(18,24,25,26)(21,27,31,29)(22,28,32,30)(1,3)(2,5)(4,8)(6,7)(9,11,12,16)(10,13,14,15)(17,20,23,19)(18,24,25,26)(21,27,31,29)(22,30,32,28)(1,2)(3,5)(4,6)(7,8)(17,21)(18,22)(19,27)(20,29)(23,31)(24,28)(25,32)(26,30) involution — undirected(1,3)(2,5)(4,8)(6,7)(17,22)(18,21)(19,28)(20,30)(23,32)(24,27)(25,31)(26,29) 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.