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