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