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