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