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