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