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