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