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