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