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