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