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