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