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