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