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