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