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