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