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