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