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