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)(18,20)(19,27)(25,29)(26,31) involution — undirected(2,5)(6,8)(9,11,12,15)(10,13,14,16)(17,18)(19,28)(20,22)(21,27)(23,31)(24,29)(25,30)(26,32)(10,14)(13,16)(17,19)(18,24)(20,30)(21,26)(22,27)(23,25)(28,31)(29,32) involution — undirected(1,3,4,7)(2,6,5,8)(17,20,22,18)(19,21,27,28)(23,26,32,31)(24,29,30,25)(17,21,22,28)(18,25,20,29)(19,26,27,31)(23,30,32,24)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.