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