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)(17,18,21,24,22,26,20,25)(19,27,28,23,30,31,29,32)(1,2,7,14,5,9,4,6)(3,8,10,15,12,16,11,13)(17,19)(18,23)(20,28)(21,29)(22,30)(24,27)(25,31)(26,32)(1,3)(2,8)(4,11)(5,12)(6,13)(7,10)(9,16)(14,15)(17,19)(18,23)(20,28)(21,29)(22,30)(24,27)(25,31)(26,32) involution — undirected(17,20,22,21)(18,24,26,25)(19,28,30,29)(23,27,32,31)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.