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