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