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