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