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