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