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