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