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