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