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