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