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