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