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