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