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