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