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