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