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