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