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