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