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