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