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