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