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