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