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