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)(11,12)(13,14)(15,16)(17,18,23,24)(19,25,29,32)(20,30,31,21)(22,28,27,26)(3,4)(6,7)(10,14)(11,16)(18,24)(21,30)(25,32)(26,28) involution — undirected(1,2)(3,6)(4,7)(5,8)(9,11,13,16)(10,15,14,12)(17,19,23,29)(18,25,24,32)(20,27,31,22)(21,28,30,26)(1,3,5,4)(2,6,8,7)(9,11,13,16)(10,15,14,12)(17,20)(18,21)(19,27)(22,29)(23,31)(24,30)(25,28)(26,32)(1,4,5,3)(2,7,8,6)(9,10)(11,15)(12,16)(13,14)(17,21)(18,20)(19,28)(22,32)(23,30)(24,31)(25,27)(26,29)(1,2)(3,6)(4,7)(5,8)(9,12,13,15)(10,16,14,11)(17,22,23,27)(18,26,24,28)(19,20,29,31)(21,32,30,25)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.