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