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