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