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