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