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