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