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