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