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