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