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