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