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