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)(11,15)(12,14)(13,16)(17,18)(19,20)(21,24)(22,23)(25,27)(26,28)(29,30)(31,32)(3,7)(5,8)(9,10,12,14)(11,13,16,15)(18,23)(20,27)(24,30)(28,32)(1,2)(3,5)(4,6)(7,8)(9,10)(11,13)(12,14)(15,16)(19,25)(20,27)(21,29)(24,30) involution — undirected(9,11,12,16)(10,13,14,15)(17,19,22,25)(18,20,23,27)(21,26,29,31)(24,28,30,32)(1,3,4,7)(2,5,6,8)(17,20)(18,19)(21,28)(22,27)(23,25)(24,26)(29,32)(30,31)(1,2)(3,5)(4,6)(7,8)(17,21,22,29)(18,24,23,30)(19,26,25,31)(20,28,27,32)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.