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