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