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)(17,18,22,24)(19,21,26,31)(20,27,30,25)(23,28,32,29)(1,3,4,12,6,11,5,13)(2,7,8,10,9,15,14,16)(17,19,21,24,22,26,31,18)(20,25,28,32,30,27,29,23)(17,20)(18,23)(19,25)(21,28)(22,30)(24,32)(26,27)(29,31) involution — undirected(3,11)(7,15)(10,16)(12,13)(18,24)(19,26)(23,32)(25,27) 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.