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