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