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