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