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