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