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