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