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)(17,18,22,25)(19,27,29,21)(20,23,26,24)(28,32,31,30)(2,6)(7,8)(9,10)(11,14)(12,13)(15,16)(17,19)(18,21)(20,31)(22,29)(23,32)(24,30)(25,27)(26,28) involution — undirected(1,3,5,4)(2,7,6,8)(10,13)(14,16)(17,20,22,26)(18,24,25,23)(19,28,29,31)(21,32,27,30)(10,13)(14,16)(17,21,24,28,22,27,23,31)(18,19,20,32,25,29,26,30)(1,4,5,3)(2,7,6,8)(9,11,12,15)(10,14,13,16)(18,25)(20,26)(21,27)(28,31)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.