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