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