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