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