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