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