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