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