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