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