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