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