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