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