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