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