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