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