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