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