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