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