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