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