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