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