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