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)(11,13)(12,14)(15,16)(17,18,24,30,23,29,21,27)(19,22,20,32,31,25,28,26)(2,5)(3,7)(9,11,12,15)(10,13,14,16)(17,19,23,31)(18,25,29,22)(20,21,28,24)(26,27,32,30)(10,14)(13,16)(17,20)(18,26)(19,21)(22,30)(23,28)(24,31)(25,27)(29,32) involution — undirected(1,3,4,7)(2,6,5,8)(17,21,23,24)(18,27,29,30)(19,20,31,28)(22,32,25,26)(2,5)(6,8)(17,22,24,32,23,25,21,26)(18,28,30,19,29,20,27,31)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.