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