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