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