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