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