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