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