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