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