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