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