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