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