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