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