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