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