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