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