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