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)(19,27,29,31)(20,24,30,28)(21,25,22,32)(1,3)(2,5)(4,8)(6,7)(9,10)(11,15)(12,14)(13,16) involution — undirected(9,11)(10,13)(12,16)(14,15)(17,19,22,28,23,29,21,24)(18,20,25,27,26,30,32,31)(3,8)(5,7)(10,14)(11,16)(17,20)(18,24)(19,25)(21,31)(22,27)(23,30)(26,28)(29,32) involution — undirected(2,6)(5,7)(10,14)(13,15)(17,21,23,22)(18,25,26,32)(19,24,29,28)(20,27,30,31)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.