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