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