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