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