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