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