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