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)(19,23)(20,27)(25,31)(26,29)(30,32) involution — undirected(1,3)(2,5)(4,8)(6,7)(9,10)(11,15)(12,16)(13,14)(17,18,21,22)(19,23,26,29)(20,24,27,28)(25,30,32,31)(10,14)(15,16)(17,19,21,26)(18,23,22,29)(20,25,27,32)(24,30,28,31)(2,6)(5,7)(9,11,13,12)(10,15,14,16)(17,20,21,27)(18,24,22,28)(19,25,26,32)(23,30,29,31)(3,8)(5,7)(9,12,13,11)(10,15,14,16)(20,27)(24,28)(25,32)(30,31)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.