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