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