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