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