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