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)(19,27)(20,29)(21,28)(22,26)(23,32)(24,30)(25,31)(1,3)(2,5)(4,7)(6,8)(9,10)(11,15)(12,14)(13,16)(17,19)(18,24)(20,25)(21,29)(22,30)(23,31)(26,27)(28,32) involution — undirected(1,3)(2,4)(5,7)(6,8)(9,11)(10,13)(12,16)(14,15)(17,20,29,18,22,32,23,26)(19,28,21,27,30,25,31,24)(1,4,6,5)(2,3,7,8)(11,16)(13,15)(17,21,22,31)(18,25,26,28)(19,29,30,23)(20,27,32,24)(1,5,6,4)(2,3,7,8)(10,14)(13,15)(19,30)(21,31)(24,27)(25,28)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.