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