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