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