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