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