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