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)(17,18,22,26,21,23,28,25)(19,27,29,24,20,30,31,32)(1,3)(2,4)(5,8)(6,7)(9,11)(10,13)(12,16)(14,15)(18,23)(19,20)(25,26)(29,31) involution — undirected(1,4,6,5)(2,7,8,3)(11,16)(13,15)(17,19,22,29,21,20,28,31)(18,24,25,27,23,32,26,30)(1,5,6,4)(2,7,8,3)(10,14)(11,16)(17,20,22,31,21,19,28,29)(18,24,25,27,23,32,26,30)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.