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