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