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