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