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