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