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