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