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