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