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