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