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