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