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