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