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