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