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