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