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