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