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