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