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