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