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