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