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