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