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