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