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