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