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