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