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