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