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