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