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