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