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