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