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