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