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