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