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