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