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