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