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