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