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