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