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