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