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)(17,18,22,23,21,27,20,26)(19,25,30,32,29,24,28,31)(2,6)(7,8)(9,11,13,12)(10,14,15,16)(18,23)(19,28)(20,22)(26,27)(29,30)(31,32)(1,3,5,4)(2,7,6,8)(9,12,13,11)(10,14,15,16)(17,19,20,28,21,29,22,30)(18,24,26,32,27,25,23,31)(1,4,5,3)(2,8,6,7)(17,19,20,28,21,29,22,30)(18,25,26,31,27,24,23,32)(19,29)(24,25)(28,30)(31,32) 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.