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