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