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