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