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