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