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