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