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