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