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