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