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