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