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)(11,15,16,13)(18,23)(19,26)(20,22)(24,31)(27,32)(28,30)(2,5)(3,7)(9,11)(10,13)(12,16)(14,15)(17,18)(19,27)(20,29)(21,23)(22,25)(24,28)(26,31)(30,32) involution — undirected(10,14)(11,16)(17,19,20,30,21,28,22,26)(18,24,29,31,23,27,25,32)(2,5)(6,8)(10,14)(13,15)(17,20,21,22)(18,25,23,29)(19,26,28,30)(24,31,27,32)(1,3,4,7)(2,6,5,8)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.