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