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