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