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