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