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