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