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