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