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