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