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