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