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