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