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)(19,26)(20,23)(21,25)(22,30)(24,29)(27,32)(28,31) involution — undirected(1,3)(2,5)(4,7)(6,8)(9,10)(11,16)(12,15)(13,14)(19,27)(24,28)(26,32)(29,31) involution — undirected(3,7)(5,8)(9,11,13,12)(10,15,14,16)(17,19)(18,24)(20,28)(21,29)(22,31)(23,27)(25,32)(26,30)(2,6)(3,7)(9,11,13,12)(10,16,14,15)(17,20,23,18)(19,28,27,24)(21,25,22,30)(26,29,32,31)(3,7)(5,8)(9,12,13,11)(10,16,14,15)(17,21,23,22)(18,25,20,30)(19,29,27,31)(24,32,28,26)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.