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