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