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