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