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