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