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