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