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