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