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