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