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