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