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