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