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