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