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