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