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