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