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