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