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