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