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