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