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