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