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)(19,24)(20,25)(21,23)(22,26)(27,31)(28,29)(30,32) involution — undirected(1,3,5,4)(2,6,8,7)(9,11,13,12)(10,14,16,15)(18,23)(19,25)(20,29)(22,31)(24,30)(28,32)(1,3,5,4)(2,7,8,6)(9,11,13,12)(10,15,16,14)(17,19)(18,24)(20,27)(21,28)(22,32)(23,29)(25,31)(26,30)(9,12,13,11)(10,15,16,14)(18,23)(19,25)(20,29)(22,31)(24,30)(28,32)(1,4,5,3)(2,6,8,7)(17,20,21,30)(18,25,23,32)(19,27,28,26)(22,24,31,29)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.