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