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