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