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